The book is now available! 251
(another Prime Pages' Curiosity)
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An anonymous seventh grader once said "I noticed that 251, 521, and 2521 - 1 are all prime. Why don't you try 512 * 2512 - 1 or something?"

 

  Submitted: 1999-09-11 19:03:51;   Last Modified: 2008-01-30 11:28:00.



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